Updated .NET samples

[geel9]

• Updated .NET Samples
  • Does not include SearchRegistry sample -- @tmarkovski please advise (current samples don't include an example query)
• Uses following baseline parameters:
  • Ecosystem name: my-ecosystem
  • Template:
    • Name: An Example Credential / an-example-credential / urn:template:my-ecosystem:an-example-credential
    • Fields: firstName, lastName, age
  • Wallet email: [email protected]
  • Credential ID: urn:uuid:7afd0191-9656-3a51-c12f-44ecfbb5a829
  • Revocation ID: urn:revocation-registry:my-ecosystem:AD9wKZCr4zVxat1XSawScD#42
  • Trust Registry ID: urn:egf:my-ecosystem:1297e60abb3b425faaaf0f0a551aae2c