fix: issue 128 - Added sanitization for guid

Microsoft.Kiota.Abstractions.Tests/RequestInformationTests.cs

@@ -153,6 +153,28 @@ public void SetsPathParametersOfBooleanType()
             // Assert
             Assert.Contains("%24count=true", requestInfo.URI.OriginalString);
         }
+        [Fact]
+        public void SetsPathParametersOfGuidType()
+        {
+            // Arrange as the request builders would
+            var requestInfo = new RequestInformation
+            {
+                HttpMethod = Method.GET,
+                UrlTemplate = "http://localhost/users{?%24requestId}"
+            };
+
+            // Act
+            var guid = Guid.Parse("6d320a89-2d8f-4204-855d-b98a1bc176d4");
+            var pathParameters = new Dictionary<string, object>
+            {
+                { "%24requestId", guid }
+            };
+
+            requestInfo.PathParameters = pathParameters;
+
+            // Assert
+            Assert.Contains($"%24requestId=6d320a89-2d8f-4204-855d-b98a1bc176d4", requestInfo.URI.OriginalString);
+        }
 
         [Fact]
         public void ThrowsInvalidOperationExceptionWhenBaseUrlNotSet()
@@ -369,6 +391,9 @@ internal class GetQueryParameters
         /// <summary>Select properties to be returned</summary>\
         [QueryParameter("%24select")]
         public string[] Select { get; set; }
+        /// <summary>Unique id of the request</summary>
+        [QueryParameter("%24requestId")]
+        public Guid RequestId { get; set; }
         /// <summary>Include count of items</summary>
         [QueryParameter("%24count")]
         public bool? Count { get; set; }

src/RequestInformation.cs

@@ -77,6 +77,7 @@ public Uri URI
             bool boolean => boolean.ToString().ToLower(),// pass in a lowercase string as the final url will be uppercase due to the way ToString() works for booleans
             DateTimeOffset dateTimeOffset => dateTimeOffset.ToString("o"),// Default to ISO 8601 for datetimeoffsets in the url.
             DateTime dateTime => dateTime.ToString("o"),// Default to ISO 8601 for datetimes in the url.
+            Guid guid => guid.ToString("D"),// Default of 32 digits separated by hyphens
             _ => value,//return object as is as the ToString method is good enough.
         };