private static Expression AddOptionalConvert(TypeReference closureReturnType, TypeReference bodyReturnType, Expression constructedExpression)
{
if (!closureReturnType.Matches(bodyReturnType))
{
var closureTypeEntity = closureReturnType.Entity as IType;
var returnTypeEntity = bodyReturnType.Entity as IType;
if (closureTypeEntity != null && returnTypeEntity != null && closureTypeEntity.IsValueType == false && returnTypeEntity.IsValueType == false)
{
return constructedExpression;
}
var convertCall = ReferenceExpression.Lift("System.Linq.Expressions.Expression.Convert");
constructedExpression = new MethodInvocationExpression(convertCall,
constructedExpression,
new TypeofExpression() { Type = closureReturnType });
}
return constructedExpression;
}