diff --git a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellExperimentalClientCodegen.java b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellExperimentalClientCodegen.java
index 889940429074..ff2e1d0b75eb 100644
--- a/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellExperimentalClientCodegen.java
+++ b/modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PowerShellExperimentalClientCodegen.java
@@ -795,6 +795,10 @@ public Map<String, Object> postProcessOperationsWithModels(Map<String, Object> o
             } else {
                 methodNames.add(op.vendorExtensions.get("x-powershell-method-name"));
             }
+
+            if (op.produces != null && op.produces.size() > 1) {
+                op.vendorExtensions.put("x-powershell-select-accept", true);
+            }
         }
 
         processedModelMaps.clear();
diff --git a/modules/openapi-generator/src/main/resources/powershell-experimental/api.mustache b/modules/openapi-generator/src/main/resources/powershell-experimental/api.mustache
index 3ddc9eda0b7e..e89e0bd91cc6 100644
--- a/modules/openapi-generator/src/main/resources/powershell-experimental/api.mustache
+++ b/modules/openapi-generator/src/main/resources/powershell-experimental/api.mustache
@@ -15,6 +15,12 @@
 {{#description}}{{{description}}}{{/description}}{{^description}}No description available.{{/description}}
 
 {{/allParams}}
+{{#vendorExtensions.x-powershell-select-accept}}
+.PARAMETER ReturnType
+
+Select the return type (optional): {{#produces}}{{{mediaType}}}{{#hasMore}}, {{/hasMore}}{{/produces}}
+
+{{/vendorExtensions.x-powershell-select-accept}}
 .PARAMETER WithHttpInfo
 
 A switch when turned on will return a hash table of Response, StatusCode and Headers instead of just the Response
@@ -38,6 +44,11 @@ function {{{vendorExtensions.x-powershell-method-name}}} {
         ${<%paramName%>},
         <%={{ }}=%>
     {{/allParams}}
+        {{#vendorExtensions.x-powershell-select-accept}}
+        [String]
+        [ValidateSet({{#produces}}"{{{mediaType}}}"{{#hasMore}}, {{/hasMore}}{{/produces}})]
+        $ReturnType,
+        {{/vendorExtensions.x-powershell-select-accept}}
         [Switch]
         $WithHttpInfo
     )
@@ -61,6 +72,13 @@ function {{{vendorExtensions.x-powershell-method-name}}} {
         $LocalVarAccepts = @({{#produces}}'{{{mediaType}}}'{{#hasMore}}, {{/hasMore}}{{/produces}})
 
         {{/hasProduces}}
+        {{#vendorExtensions.x-powershell-select-accept}}
+        if ($ReturnType) {
+            # use the return type (MIME) provided by the user
+            $LocalVarAccepts = @($ReturnType)
+        }
+
+        {{/vendorExtensions.x-powershell-select-accept}}
         {{#hasConsumes}}
         # HTTP header 'Content-Type'
         $LocalVarContentTypes = @({{#consumes}}'{{{mediaType}}}'{{#hasMore}}, {{/hasMore}}{{/consumes}})
diff --git a/modules/openapi-generator/src/main/resources/powershell-experimental/api_client.mustache b/modules/openapi-generator/src/main/resources/powershell-experimental/api_client.mustache
index 0a0c74bfed7b..0c559727be92 100644
--- a/modules/openapi-generator/src/main/resources/powershell-experimental/api_client.mustache
+++ b/modules/openapi-generator/src/main/resources/powershell-experimental/api_client.mustache
@@ -108,7 +108,7 @@ function Invoke-{{{apiNamePrefix}}}ApiClient {
     }
 
     return @{
-        Response = DeserializeResponse -Response $Response -ReturnType $ReturnType
+        Response = DeserializeResponse -Response $Response -ReturnType $ReturnType -ContentTypes $Response.Headers["Content-Type"]
         StatusCode = $Response.StatusCode
         Headers = $Response.Headers
     }
@@ -174,7 +174,10 @@ function DeserializeResponse {
         [string]$ReturnType,
         [Parameter(Mandatory)]
         [AllowEmptyString()]
-        [string]$Response
+        [string]$Response,
+        [Parameter(Mandatory)]
+        [AllowEmptyCollection()]
+        [string[]]$ContentTypes
     )
 
     If ([string]::IsNullOrEmpty($ReturnType)) { # void response
@@ -183,7 +186,22 @@ function DeserializeResponse {
         return ConvertFrom-Json $Response
     } Elseif (@("String", "Boolean", "System.DateTime") -contains $ReturnType) { # string, boolean ,datetime
         return $Response
-    } Else { # model
-        return ConvertFrom-Json $Response
+    } Else { # others (e.g. model, file)
+        if ($ContentTypes) {
+            $ContentType = $null
+            if ($ContentTypes.Count -gt 1) {
+                $ContentType = SelectContentTypeHeaders -ContentTypes $ContentTypes
+            } else {
+                $ContentType = $ContentTypes[0]
+            }
+
+            if (IsJsonMIME -MIME $ContentType) {  # JSON
+                return ConvertFrom-Json $Response
+            } else { # XML, file, etc
+                return $Response
+            }
+        } else { # no content type in response header, returning raw response
+            return $Response
+        }
     }
 }
diff --git a/samples/client/petstore/powershell-experimental/Test1.ps1 b/samples/client/petstore/powershell-experimental/Test1.ps1
index 2c6ab8827ae0..cf00308684a8 100644
--- a/samples/client/petstore/powershell-experimental/Test1.ps1
+++ b/samples/client/petstore/powershell-experimental/Test1.ps1
@@ -16,7 +16,7 @@ $body = (Initialize-PSUser -Id 123  -Username "Username_example"  -FirstName "Fi
 $Id = 38369
 
 #$result = Update-PSPetWithForm 
-try {
+#try {
     $pet = Initialize-PSPet -Id $Id -Name 'foo' -Category (
         Initialize-PSCategory -Id $Id -Name 'bar'
     ) -PhotoUrls @(
@@ -29,14 +29,18 @@ try {
     #Write-Host $pet
     $Result = Add-PSPet -Pet $pet
     Set-PSConfigurationApiKey -Id "api_key" -ApiKey "zzZZZZZZZZZZZZZ"
-    $Result2 = Get-PSPetById -petId ($Id + 10) -Verbose -WithHttpInfo #-testHeader "testing only" -testQuery "testing something here"
-    Write-Host $Result2.GetType()
-} catch {
-    #Write-Host ("Exception occured when calling '': {0}" -f ($_.ErrorDetails | ConvertFrom-Json))
-    #Write-Host ("Response headers: {0}" -f ($_.Exception.Response.Headers | ConvertTo-Json))
-}
+    $Result2 = Get-PSPetById -petId ($Id) -Verbose -WithHttpInfo #-testHeader "testing only" -testQuery "testing something here"
+    Write-Host $Result2["Headers"]["Content-Type"]
+    $Result3 = Get-PSPetById -petId ($Id) -Verbose -WithHttpInfo -ReturnType "application/xml" #-testHeader "testing only" -testQuery "testing something here"
+    Write-Host $Result3["Headers"]["Content-Type"]
+    Write-Host $Result3["Response"]
+#} catch {
+#    Write-Host ("Exception occured when calling '': {0}" -f ($_.ErrorDetails | ConvertFrom-Json))
+#    Write-Host ("Response headers: {0}" -f ($_.Exception.Response.Headers | ConvertTo-Json))
+#}
 
-Write-Host "Before exit $($Result2.GetType())"
+#$Result = Add-PSPet -Pet $pet -ReturnType "application/xml"
+#Write-Host "Before exit $($Result2.GetType())"
 
 #$result | Write-Host
 
diff --git a/samples/client/petstore/powershell-experimental/src/PSPetstore/API/PSPetApi.ps1 b/samples/client/petstore/powershell-experimental/src/PSPetstore/API/PSPetApi.ps1
index da90fc7faa14..f7833bd5e695 100644
--- a/samples/client/petstore/powershell-experimental/src/PSPetstore/API/PSPetApi.ps1
+++ b/samples/client/petstore/powershell-experimental/src/PSPetstore/API/PSPetApi.ps1
@@ -17,6 +17,10 @@ No description available.
 .PARAMETER Pet
 Pet object that needs to be added to the store
 
+.PARAMETER ReturnType
+
+Select the return type (optional): application/xml, application/json
+
 .PARAMETER WithHttpInfo
 
 A switch when turned on will return a hash table of Response, StatusCode and Headers instead of just the Response
@@ -31,6 +35,9 @@ function Add-PSPet {
         [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Mandatory = $false)]
         [PSCustomObject]
         ${Pet},
+        [String]
+        [ValidateSet("application/xml", "application/json")]
+        $ReturnType,
         [Switch]
         $WithHttpInfo
     )
@@ -52,6 +59,11 @@ function Add-PSPet {
         # HTTP header 'Accept' (if needed)
         $LocalVarAccepts = @('application/xml', 'application/json')
 
+        if ($ReturnType) {
+            # use the return type (MIME) provided by the user
+            $LocalVarAccepts = @($ReturnType)
+        }
+
         # HTTP header 'Content-Type'
         $LocalVarContentTypes = @('application/json', 'application/xml')
 
@@ -175,6 +187,10 @@ No description available.
 .PARAMETER Status
 Status values that need to be considered for filter
 
+.PARAMETER ReturnType
+
+Select the return type (optional): application/xml, application/json
+
 .PARAMETER WithHttpInfo
 
 A switch when turned on will return a hash table of Response, StatusCode and Headers instead of just the Response
@@ -190,6 +206,9 @@ function Find-PSPetsByStatus {
         [ValidateSet("available", "pending", "sold")]
         [String[]]
         ${Status},
+        [String]
+        [ValidateSet("application/xml", "application/json")]
+        $ReturnType,
         [Switch]
         $WithHttpInfo
     )
@@ -211,6 +230,11 @@ function Find-PSPetsByStatus {
         # HTTP header 'Accept' (if needed)
         $LocalVarAccepts = @('application/xml', 'application/json')
 
+        if ($ReturnType) {
+            # use the return type (MIME) provided by the user
+            $LocalVarAccepts = @($ReturnType)
+        }
+
         $LocalVarUri = '/pet/findByStatus'
 
         if (!$Status) {
@@ -250,6 +274,10 @@ No description available.
 .PARAMETER Tags
 Tags to filter by
 
+.PARAMETER ReturnType
+
+Select the return type (optional): application/xml, application/json
+
 .PARAMETER WithHttpInfo
 
 A switch when turned on will return a hash table of Response, StatusCode and Headers instead of just the Response
@@ -264,6 +292,9 @@ function Find-PSPetsByTags {
         [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Mandatory = $false)]
         [String[]]
         ${Tags},
+        [String]
+        [ValidateSet("application/xml", "application/json")]
+        $ReturnType,
         [Switch]
         $WithHttpInfo
     )
@@ -285,6 +316,11 @@ function Find-PSPetsByTags {
         # HTTP header 'Accept' (if needed)
         $LocalVarAccepts = @('application/xml', 'application/json')
 
+        if ($ReturnType) {
+            # use the return type (MIME) provided by the user
+            $LocalVarAccepts = @($ReturnType)
+        }
+
         $LocalVarUri = '/pet/findByTags'
 
         if (!$Tags) {
@@ -324,6 +360,10 @@ No description available.
 .PARAMETER PetId
 ID of pet to return
 
+.PARAMETER ReturnType
+
+Select the return type (optional): application/xml, application/json
+
 .PARAMETER WithHttpInfo
 
 A switch when turned on will return a hash table of Response, StatusCode and Headers instead of just the Response
@@ -338,6 +378,9 @@ function Get-PSPetById {
         [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Mandatory = $false)]
         [Int64]
         ${PetId},
+        [String]
+        [ValidateSet("application/xml", "application/json")]
+        $ReturnType,
         [Switch]
         $WithHttpInfo
     )
@@ -359,6 +402,11 @@ function Get-PSPetById {
         # HTTP header 'Accept' (if needed)
         $LocalVarAccepts = @('application/xml', 'application/json')
 
+        if ($ReturnType) {
+            # use the return type (MIME) provided by the user
+            $LocalVarAccepts = @($ReturnType)
+        }
+
         $LocalVarUri = '/pet/{petId}'
         if (!$PetId) {
             throw "Error! The required parameter `PetId` missing when calling getPetById."
@@ -401,6 +449,10 @@ No description available.
 .PARAMETER Pet
 Pet object that needs to be added to the store
 
+.PARAMETER ReturnType
+
+Select the return type (optional): application/xml, application/json
+
 .PARAMETER WithHttpInfo
 
 A switch when turned on will return a hash table of Response, StatusCode and Headers instead of just the Response
@@ -415,6 +467,9 @@ function Update-PSPet {
         [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Mandatory = $false)]
         [PSCustomObject]
         ${Pet},
+        [String]
+        [ValidateSet("application/xml", "application/json")]
+        $ReturnType,
         [Switch]
         $WithHttpInfo
     )
@@ -436,6 +491,11 @@ function Update-PSPet {
         # HTTP header 'Accept' (if needed)
         $LocalVarAccepts = @('application/xml', 'application/json')
 
+        if ($ReturnType) {
+            # use the return type (MIME) provided by the user
+            $LocalVarAccepts = @($ReturnType)
+        }
+
         # HTTP header 'Content-Type'
         $LocalVarContentTypes = @('application/json', 'application/xml')
 
diff --git a/samples/client/petstore/powershell-experimental/src/PSPetstore/API/PSStoreApi.ps1 b/samples/client/petstore/powershell-experimental/src/PSPetstore/API/PSStoreApi.ps1
index c496fc0c7508..b6f3645d5339 100644
--- a/samples/client/petstore/powershell-experimental/src/PSPetstore/API/PSStoreApi.ps1
+++ b/samples/client/petstore/powershell-experimental/src/PSPetstore/API/PSStoreApi.ps1
@@ -153,6 +153,10 @@ No description available.
 .PARAMETER OrderId
 ID of pet that needs to be fetched
 
+.PARAMETER ReturnType
+
+Select the return type (optional): application/xml, application/json
+
 .PARAMETER WithHttpInfo
 
 A switch when turned on will return a hash table of Response, StatusCode and Headers instead of just the Response
@@ -167,6 +171,9 @@ function Get-PSOrderById {
         [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Mandatory = $false)]
         [Int64]
         ${OrderId},
+        [String]
+        [ValidateSet("application/xml", "application/json")]
+        $ReturnType,
         [Switch]
         $WithHttpInfo
     )
@@ -188,6 +195,11 @@ function Get-PSOrderById {
         # HTTP header 'Accept' (if needed)
         $LocalVarAccepts = @('application/xml', 'application/json')
 
+        if ($ReturnType) {
+            # use the return type (MIME) provided by the user
+            $LocalVarAccepts = @($ReturnType)
+        }
+
         $LocalVarUri = '/store/order/{orderId}'
         if (!$OrderId) {
             throw "Error! The required parameter `OrderId` missing when calling getOrderById."
@@ -225,6 +237,10 @@ No description available.
 .PARAMETER Order
 order placed for purchasing the pet
 
+.PARAMETER ReturnType
+
+Select the return type (optional): application/xml, application/json
+
 .PARAMETER WithHttpInfo
 
 A switch when turned on will return a hash table of Response, StatusCode and Headers instead of just the Response
@@ -239,6 +255,9 @@ function Invoke-PSPlaceOrder {
         [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Mandatory = $false)]
         [PSCustomObject]
         ${Order},
+        [String]
+        [ValidateSet("application/xml", "application/json")]
+        $ReturnType,
         [Switch]
         $WithHttpInfo
     )
@@ -260,6 +279,11 @@ function Invoke-PSPlaceOrder {
         # HTTP header 'Accept' (if needed)
         $LocalVarAccepts = @('application/xml', 'application/json')
 
+        if ($ReturnType) {
+            # use the return type (MIME) provided by the user
+            $LocalVarAccepts = @($ReturnType)
+        }
+
         # HTTP header 'Content-Type'
         $LocalVarContentTypes = @('application/json')
 
diff --git a/samples/client/petstore/powershell-experimental/src/PSPetstore/API/PSUserApi.ps1 b/samples/client/petstore/powershell-experimental/src/PSPetstore/API/PSUserApi.ps1
index d931cbe107c8..57422ca50a78 100644
--- a/samples/client/petstore/powershell-experimental/src/PSPetstore/API/PSUserApi.ps1
+++ b/samples/client/petstore/powershell-experimental/src/PSPetstore/API/PSUserApi.ps1
@@ -328,6 +328,10 @@ No description available.
 .PARAMETER Username
 The name that needs to be fetched. Use user1 for testing.
 
+.PARAMETER ReturnType
+
+Select the return type (optional): application/xml, application/json
+
 .PARAMETER WithHttpInfo
 
 A switch when turned on will return a hash table of Response, StatusCode and Headers instead of just the Response
@@ -342,6 +346,9 @@ function Get-PSUserByName {
         [Parameter(Position = 0, ValueFromPipeline = $true, ValueFromPipelineByPropertyName = $true, Mandatory = $false)]
         [String]
         ${Username},
+        [String]
+        [ValidateSet("application/xml", "application/json")]
+        $ReturnType,
         [Switch]
         $WithHttpInfo
     )
@@ -363,6 +370,11 @@ function Get-PSUserByName {
         # HTTP header 'Accept' (if needed)
         $LocalVarAccepts = @('application/xml', 'application/json')
 
+        if ($ReturnType) {
+            # use the return type (MIME) provided by the user
+            $LocalVarAccepts = @($ReturnType)
+        }
+
         $LocalVarUri = '/user/{username}'
         if (!$Username) {
             throw "Error! The required parameter `Username` missing when calling getUserByName."
@@ -403,6 +415,10 @@ The user name for login
 .PARAMETER Password
 The password for login in clear text
 
+.PARAMETER ReturnType
+
+Select the return type (optional): application/xml, application/json
+
 .PARAMETER WithHttpInfo
 
 A switch when turned on will return a hash table of Response, StatusCode and Headers instead of just the Response
@@ -420,6 +436,9 @@ function Invoke-PSLoginUser {
         [Parameter(Position = 1, ValueFromPipelineByPropertyName = $true, Mandatory = $false)]
         [String]
         ${Password},
+        [String]
+        [ValidateSet("application/xml", "application/json")]
+        $ReturnType,
         [Switch]
         $WithHttpInfo
     )
@@ -441,6 +460,11 @@ function Invoke-PSLoginUser {
         # HTTP header 'Accept' (if needed)
         $LocalVarAccepts = @('application/xml', 'application/json')
 
+        if ($ReturnType) {
+            # use the return type (MIME) provided by the user
+            $LocalVarAccepts = @($ReturnType)
+        }
+
         $LocalVarUri = '/user/login'
 
         if (!$Username) {
diff --git a/samples/client/petstore/powershell-experimental/src/PSPetstore/PSPetstore.psd1 b/samples/client/petstore/powershell-experimental/src/PSPetstore/PSPetstore.psd1
index ba8f3680cbdd..a481d378d49a 100644
--- a/samples/client/petstore/powershell-experimental/src/PSPetstore/PSPetstore.psd1
+++ b/samples/client/petstore/powershell-experimental/src/PSPetstore/PSPetstore.psd1
@@ -3,7 +3,7 @@
 #
 # Generated by: OpenAPI Generator Team
 #
-# Generated on: 4/8/20
+# Generated on: 4/9/20
 #
 
 @{
diff --git a/samples/client/petstore/powershell-experimental/src/PSPetstore/Private/PSApiClient.ps1 b/samples/client/petstore/powershell-experimental/src/PSPetstore/Private/PSApiClient.ps1
index 1cda3eec8aa7..d70923650995 100644
--- a/samples/client/petstore/powershell-experimental/src/PSPetstore/Private/PSApiClient.ps1
+++ b/samples/client/petstore/powershell-experimental/src/PSPetstore/Private/PSApiClient.ps1
@@ -114,7 +114,7 @@ function Invoke-PSApiClient {
     }
 
     return @{
-        Response = DeserializeResponse -Response $Response -ReturnType $ReturnType
+        Response = DeserializeResponse -Response $Response -ReturnType $ReturnType -ContentTypes $Response.Headers["Content-Type"]
         StatusCode = $Response.StatusCode
         Headers = $Response.Headers
     }
@@ -180,7 +180,10 @@ function DeserializeResponse {
         [string]$ReturnType,
         [Parameter(Mandatory)]
         [AllowEmptyString()]
-        [string]$Response
+        [string]$Response,
+        [Parameter(Mandatory)]
+        [AllowEmptyCollection()]
+        [string[]]$ContentTypes
     )
 
     If ([string]::IsNullOrEmpty($ReturnType)) { # void response
@@ -189,7 +192,22 @@ function DeserializeResponse {
         return ConvertFrom-Json $Response
     } Elseif (@("String", "Boolean", "System.DateTime") -contains $ReturnType) { # string, boolean ,datetime
         return $Response
-    } Else { # model
-        return ConvertFrom-Json $Response
+    } Else { # others (e.g. model, file)
+        if ($ContentTypes) {
+            $ContentType = $null
+            if ($ContentTypes.Count -gt 1) {
+                $ContentType = SelectContentTypeHeaders -ContentTypes $ContentTypes
+            } else {
+                $ContentType = $ContentTypes[0]
+            }
+
+            if (IsJsonMIME -MIME $ContentType) {  # JSON
+                return ConvertFrom-Json $Response
+            } else { # XML, file, etc
+                return $Response
+            }
+        } else { # no content type in response header, returning raw response
+            return $Response
+        }
     }
 }